Electricity
Our society relies on electricity.The traditional way to make electricity is to burn fossil fuel such as coal or oil. Unfortunately we are burning up all the reserves in the earth and if we do not stop soon they will all be finished.
The other way we make electricity is by using unclear power.
This is unpopular and dangerous as we do not know how to dispose safely of unclear waste.

Scientists are busy developing alternative solutions now. One of these is wind power. Building wind turbines on the top of the hills and out at sea is a good way of producing a lot of very low cost electricity.
The problem is that wind turbines are very big and not very beautiful.
Another source of cheap energy is the sun .Lots of people now own solar panels and are saving a lot of money by using them for their heating and lighting.

Another great source of energy is the sea.The sea is moving all the time, both in waves and in tidal action, and if that energy could be converted into electricity cheaply we could produce enough electricity to continue living as we want to without destroying our planet.
What we need in order to solve the energy crisis is a combination of all these alternatives, depending on which is the best for the environment.